Base station, wireless communication system, and wireless communication method

Abstract

A base station according to an embodiment is a base station that performs wireless communication with a terminal using a directional antenna within a predetermined area, the base station including: acquisition circuitry configured to acquire data from a database that holds data indicating an antenna directivity suitable for each state of a terminal or each arrival direction of a radio wave from the terminal measured in a scale model in which a structure within a predetermined area is reduced at a predetermined scale factor; collection circuitry configured to collect a state of a terminal or an arrival direction of a radio wave from the terminal in practice within a predetermined area; and controller configured to control directivity of the directional antenna with respect to the terminal in practice within a predetermined area based on the state of the terminal or the arrival direction and data.

The invention claimed is: 
     
         1 . A base station to perform wireless communication with a terminal using a directional antenna within a predetermined area, the base station comprising:
 acquisition circuitry configured to acquire data from a database that holds the data indicating an antenna directivity suitable for each state of the terminal or each arrival direction of a radio wave from the terminal measured in a scale model in which a structure within the predetermined area is reduced at a predetermined scale factor;   collection circuitry configured to collect a state of a terminal or an arrival direction of a radio wave from the terminal in practice within the predetermined area; and   controller configured to control directivity of the directional antenna with respect to the terminal in practice within the predetermined area based on the state of the terminal or the arrival direction of the radio wave from the terminal collected by the collection circuitry, and data acquired by the acquisition circuitry.   
     
     
         2 . The base station according to  claim 1 , further comprising:
 imaging circuitry configured to capture an image,   wherein the collection circuitry collects the arrival direction of the radio wave from the terminal based on a shielding environment with respect to a terminal included in an image captured by the imaging circuitry.   
     
     
         3 . A wireless communication system in which a base station performs wireless communication with a terminal using a directional antenna within the predetermined area, the wireless communication system comprising:
 a database that holds data indicating an antenna directivity of the base station suitable for each state of the terminal or each arrival direction of a radio wave from the terminal measured in a scale model in which a structure within the predetermined area is reduced at a predetermined scale factor,   wherein the base station includes:   collection circuitry configured to collect a state of a terminal or an arrival direction of a radio wave from the terminal in practice within the predetermined area, and   controller configured to control directivity of the directional antenna with respect to the terminal in practice within the predetermined area based on the state of the terminal or the arrival direction of the radio wave from the terminal collected by the collection circuitry, and data held by the database.   
     
     
         4 . The wireless communication system according to  claim 3 , wherein:
 the base station further includes imaging circuitry configured to capture an image, and   the collection circuitry collects the arrival direction of the radio wave from the terminal based on a shielding environment with respect to a terminal included in an image captured by the imaging circuitry.   
     
     
         5 . The wireless communication system according to  claim 3 , further comprising:
 a relay station that relays a radio wave or a reflector that reflects a radio wave,   wherein the collection circuitry collects an arrival direction of a radio wave arriving via the relay station or the reflector.   
     
     
         6 . A wireless communication method in which a base station performs wireless communication with a terminal using a directional antenna within a predetermined area, the wireless communication method comprising:
 acquiring data from a database that holds the data indicating an antenna directivity of the base station suitable for each state of the terminal or each arrival direction of a radio wave from the terminal measured in a scale model in which a structure within the predetermined area is reduced at a predetermined scale factor;   collecting a state of a terminal or an arrival direction of a radio wave from the terminal in practice within the predetermined area; and   controlling directivity of the directional antenna with respect to the terminal in practice within the predetermined area based on the collected state of the terminal or the arrival direction of the radio wave from the terminal, and the acquired data.   
     
     
         7 . The wireless communication method according to  claim 6 , further comprising:
 capturing an image from the base station,   wherein in the collecting, the arrival direction of the radio wave from the terminal is collected based on a shielding environment with respect to a terminal included in an image captured in the capturing.   
     
     
         8 . The wireless communication method according to  claim 6 , wherein:
 in the collecting, an arrival direction of a radio wave arriving via a relay station that relays a radio wave or a reflector that reflects a radio wave is collected.